<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<table border="1" width="600px" >
    <tr><td colspan="3" bgcolor="aqua"> a</td> </tr>
    <tr><td> 4</td>
    <td>5</td>
    <td>6</td></tr>
    <tr><td>7</td>
    <td>8</td>
    <td>9</td></tr>
</table>
</body>
</html>